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问题 解答题

把下列多项式分解因式

（1）6a2-3ab；

（2）9x2-1；

（3）2m2+4m+2．

答案

（1）6a2-3ab=3a（2a-b）；

（2）9x2-1=（3x+1）（3x-1）；

（3）2m2+4m+2=2（m2+2m+1）=2（m+1）2．

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填空题

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